Needle-bar mechanism.



A. H. DE VOE.

NEEDLE BAR MECHANISM.

APPLICATION FILED APR. 24. l9l8.

1,296,633; Patented Mar. 11',1919. I

IN VE/V TOR ALBERT H. DE

voE, 0E WEs'rE -ELD, NEW JERSEY, ASSIGNOR IO-THE SINGER MANU- EACTUEING COMPANY, A CORPORATION OF NEW YORK.

NEEDLE-BAR ECHANISM.

Specification of Letters Patent.

Application filed April 24, 1918." Serial No. 230,399.

To all whom it may concern:

Be it known that I, ALBERT H.'DE Von, a citizen of the United States, residing at Westfield, in the county of Union and State of New Jersey, have invented certain new without liability of the. cross-bar springing or tilting and throwing the needles sustained thereby out of coeperativerelation with the lower stitch-forming instru mentalities. It is an aim of the present invention to reinforce and embrace the. cross-bar carried by the needle-bar to hold the needles againstendwise-and lateral displacement, that is, to hold the needles in their proper paths for cooperation with the lower stitch-forming instrumentalities. I

The needles in the type of sewing machines towhich the present invention relates.

usually have their. shanks positionedjln a socket in. the needle-bar and are clamped by a screw extending transverse the cross-bar. In setting a needle in positionthe operator in tightening up the clamp screw isliable to flex and permanently bend the cross-bar because of the relatively considerable. distance between the point of. application of the screw driver and the needle-bar. It is an aim of the present'invention to brace the cross-bar between the needle-bar and its extremity in order to lessen if not eliminate the danger of flexing orbending the crossbarwhen replacing a needle. v

A preferred form of the invention consists of a brace of plate-like form fixed to the needle-bar above and also within the head of the machine and fixed also to a cross-bar at a distance from the junction of the bars for preventing tilting of the crossbar about the junction. And it consists also in a steady or rest having surfaces located on either side of I the needle-bar and in contact with the rear of the cross-bar which is thereby prevented from angulanrotation about the axis of the needle-bar as it moves laterally up and down during the operation of themachine.

An embodiment ofthe invention is illustrated in the accompanying drawings, in

headandpart ofthe overhanging arm of a sewlng machine. Fig. 2 is an end' elevation of the same. Flg. 3 is a plan view of the in .vention with the lower extremity of the head .of'the machine appearing in section and F1g. 4 is a detail showing the connection between theneedle and cross-bars.

On the end of the overhanging arm 1 of the frame of a machine is the usual-head 2 having spaced bearings 33 for a'needle-bar 4 which'is reciprocated from a shaft 5 m the overhanging arm through a crank-arm 6 connected by the link 7 to a collar '8 on Patented Mar. 11, 1919.

vwhich Figure 1 is a front elevation of the the needle-bar, all of which is well known construction.

As shown in detail in Fig. 4: the lower end of the needle-bar is reduced to form a shoulder 9 and stud 10 which is shorter; than the aperture in a collar 11 designed to embrace lar is adapted to thrust against the stud end 10 and because of the slot 13 therein, which communicates with the internally threaded socket 14: that receives a threadended pin 15 extending upwardly from the cross-head 16, to thereby firmly secure the cross-head to the needle-bar. The cross-head 16' is channeled to receive an edge 17 of the relatively thin cross-bar 18 and is apertured to recelve the holding screws 19. Adjacent the cross-head on a split collar 25 grippedto the needle-bar above the head of the overhanging arm.

With the needleand cross-bars braced as has been. described, the latter bar is held positively in a definite intersecting relation the stud. A screw 12 threaded into the 'colwith the needle-bar and the angle between.

' by an operator, a steady or rest 28 is secured to the lower portion of the head of the machine with its fiat bearing surfaces 29 arranged on opposite sides. of the needle-bar intermediate the same'and' the ends of the cross-bar 18. The steady or rest 28 is secured by screws 30 to the angles 31 which are provided with slots 2 receiving the screws 33- which are tapped into a bracket 34:- positively secured by the screw 35 to the rear face of the depending portion 36 .of'the head of the machine. Preferably the angles 31 have their rearwardly extending legs secured in Slideways 37 formed in the sides of the bracket 34. A plate 38 is secured by screws 39 to the brace 20 and in its opposite ends apertures 40 are provided to guide the thread leading from the supply and from the stationary guide 41 through the same to the needles, the plate 38 being bent as clearly shown in Fig. 3 to clear the head of the machine when the needle-bar is recip'rocated.

Having thus set forth the nature of the I invention, what I claim herein is 1. In a sewing machine, a needle-bar ill chanism comprising a reciprocatory needle-bar, a cross-bar secured to the lower end thereof, and means secured to the crossand needle-bars, respectively, at points removed from their junction for bracing the crossbar.

2. In a sewing machine, a needle-bar mechanism comprising a reciprocatory needie-bar, a cross-bar secured to the lower end thereof, and means securedto the needle-bar at a plurality of spaced points and to the crossrbar at a point removed from the junction of the bars for maintainingthe needleand cross-bars in definite angular relation.

V In a sewing machine, a needle-bar mechanism comprising a reciproc atory needle-bar, a cross-bar secured to the lower end thereof, and bracing means secured to the needle-bar at its upper end and to the crossbar away from the junction of the two bars for maintaining the bars in definite angular relation. 7

4. A sewing machine having an overhanging armterminatingin' a head having spaced and alined bearings formed therein, a needie-bar slidably mounted in said bearings, a cross bar secured to the lower end ofthe needle barand adapted to carry needles, a brace secured to said needle-bar above and also intermediate said bearings and to said cross-bar at a distance from'the junction of the-two-bars.

)5. A sewing machine having an over- 7 needle-bar slidably mounted in said bean ings, a cross-bar secured to the'lower end of the needle-bar andradapted to carryneedles, collars gripped on said needle-bar above and intermediate the bearings in said head, each collar having a lateral extension, a" brace secured to the lateral extensions of said collars and to-said cross-bar at a distance. from the junction of the needle-bar and cross-bar.

6. A sewing machine having a needle-bar, a cross-bar secured substantially midway between its ends to, the lower end of the needle-bar, means for securing needles to the cross-bar, and stationary means contacting: directly with the cross-bar and located in rear of the cross-bar for preventing the lateral displacement of the needles carrieid thereby.'

7. A sewing machine having a needle-bar,

a cross-bar. secured to the lower end'of the needle-bar, means for securmg needles to said cross-bar, and means in addition to the bars for preventing endwise and lateral displacement of the needles.

.8. A sewing machine having a needle-bar, a cross-bar secured to the lower end'of the needle-bar and adapted to carryneedles,

means rigidly connecting the needle- 7 and cross-bars at points remote from their junc- 7 tion for preventing endwise displacement of the needles, and means for preventing. lateral flexure of the cross-lbarand lateral displacement of the needles.

9, A sewing ma hinehaving a needle-bar,

of the needles is prevented.

. a cross-bar adapted to carry needles secured 10. A sewing machine having a needlebar, a cross-bar secured thereto at its lower end and adapted to carry needles, a plate sepoints removed from their junction and locured to the needle-bar andcross-bar at cated in the plane defined by said bars for holding the needles fixed against endwise displacement. V V V 11. A sewing machine having a needlebar, a cross-bar securedthereto' at its lower 7 end and adapted to carryneedles, and guiding means on both sides of said needle-bar and contiguous to sa d cross-bar for preventing lateral displacement of the needles.

12. A sewing machinehaving a needlebar,a cross-bar secured thereto at its lower.

. end and adapted tocarry needles, and guiding means contiguous to said cross bar' fbr preventing lateral displacement of the neelateral displacement of the needles, said dles, said guiding means having bearing-surguiding means including a plate having faces spaced on opposite sides of and exbearing surfaces spaced on opposite sides of tending approximately parallel to the'neeand extending approximately parallel to 5 die-bar. the needle-bar, and a bracket adjustably 15 13. A sewing machine having a needlesupporting said plate and supported by a bar, a cross-bar secured thereto at its lower fixed part of the machine. end and adapted to carry needles, guiding In testimony whereof, I have signed my means on both sides oftsaid needle-bar, and name to this specification.

10 contiguous to said cross-bar for preventing ALBERT H. DE VOE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

